Territory



(No Mudel.)

v I. I. LANCASTER.

HOISTING AND LOWERING APPARATUS.

Patented Sept w 1 AA @A A. v

WITNESSES I ATTORNEYS.

N. PETERs PbuftrLillmgraphzr. Wuhingwn. DJ;

FFlClEO ISAAC I. LANCASTER, OF TACOMA, ASHINGTON TERRITORY.

HOISTING AND LOWERlNG APPARATUS.

EEPBCIFICATION forming part of Letters Patent No. 325,614, datedSeptember 1, 1885.

Application filed June 20, I895. (No model.)

To all whom it may concern.-

Be it known that 1, Isaac I. Lnwcasrnn, of Tacoma, in the county ofPierce and Territory of Vashington, have invented a new and ImprovedHoisting and Lowering Apparatus, of which the following is a full,clear, and exact description.

My invention relates to apparatus for hoisting and lowering anything bythe aid of a windlass and jack, and has for its object to provide asimple, efficient, cheap, and durable machine for these purposes.

The invention is an improvement on United States Patent No. 4S,t1-t,issued to Isaac l. Lancaster, and dated June .27, 1865; and it consistsin novel arrangements ofspri ngs which actuate the pawls in various usesof the machine, and also in other novel constructions and combinationsof parts of the machine, all as hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure l is a side elevation of my improvement with the lever brokenaway and the pawls in positions to allow rapid lowering of the weight orload. Fig. 2 is a plan view, with the post of the lifting-jack inhorizontal section. Fig. 3 is a longitudinal sectional elevation takenon the line a: :0, Fig. 2, with the parts arranged for hoisting a load;and Fig. 4 is a like viewillustrating the action in slowly lowering theload.

The letter A indicates a suitable frame, in the side parts, a a, ofwhich is journaled a shaft, B, on which is fixed a ratchet-wheel, O,with which are adapted to engage the pawls D D, which are pivoted,respectively, to lugs c c on the short arm 'of a lever, E, which ispivoted by its shaft F to the frame A, and has suitable length to give apowerful leverage in working the pawls, as presently eX- plaincd.

To the lever E is fixed one end of a spring, G, which at the proper timeacts by its free end against a pin, 9, fixed in the side of the pawl D,to throw said pawl away from the teeth of the ratchet G. A spring, G,pivoted at 9" to the lever E, may be swung on said pivot so its free endg may be allowed to press the pawl D upward from the ratchet-teeth, asin Figs. 1 and 4,01 so as toibe free from the pawl D, as in Fig. 3. Aspring, (I, fixed to pawl 1), may bear on the pawl D to force it to theratchet O, and a spring, G fixed to pawl D. has alike effectin certainpositions of the paws, as hereinafter described.

At H is shown a bar having a head, h, bent over pawl D, so as to retainthe pawls in worlc ing position.

\Vith the exceptions that I have made the spring G straight to act on aprojecting pin, 9, tolift thepawl D, instead of bending the end of thespring sidewise beneath the pawl, and have added the spring G to thelever and pawl mechanism, all the parts above named are the same inconstruction as the frame, ratchet, and lever and pawl mechanism shownand de scribed in the aforesaid Patent No. 48,414.

In a suitable head-block, I, fixed to frame A, is fittted to slide thepost or bar J, having teeth j, which are engaged by the teeth of apinion, K, fast on shaft B, when the post J is applied to the machinefor use as aliftingjack.

To the shaft B is fitted loosely the Windlassbarrel L, to which a rope,I, is connected, and the barrel L has a collar, M, provided with slotsor notches m, into which may'enter the pin N, fixed in shaft 13, whenthe barrel is forced outward from the frame A by means of a lever, O,which is pivoted on a pin, 0, to frame A, and has a forked stem or part,0, which engages or yokes around opposite faces of a disk or collar, 1?,fixed to the barrel L; and below the stem 0 the lever O has an arm, 0,which is shaped to bear upon the periphery of the disk P and serve as abrake in lowering the load suspended from the rope Z when the barrel isswung toward the frame A by the lever to disengage the notches on ofcollar M from the pin N on the shaft l3, as will readily be understood.

The operation of the ratchet and pawl mechanism being particularlydescribed in aforesaid Patcnt No 48,414, a brief description of it herewill suffice.

To turn the ratchet G to lift a load either by the jack J K or thewindlass L I, the lower spring, G, will be swung out from under the pawlD, as in Fig. 3, and by rocking the lever E the pawls D D willalternately engage the ratchet O for turning it as required, the springJr" then acting to press the pawl D to the ratchet, so as certainly toengage the ratchetteeth at every downstroke of the lever, which the pawlwould not always do when the spring G" was not applied to it, as in theformer construction. Hence the advantage ofsaid spring is obvious.

To allow the load to run down quickly, the spring G will be swung underpawl D, and the lever E will fully be pushed down, as in Fig. 1, so thatboth pawls D D will be clear of the ratchet O, the upper pawl thenresting against the retainer H, and this will be the operation when aweight suspended from the windlass-barrel L by rope Z is to be allowedto drop with full force, as in driving piles, posts, and thc like, theWindlass-barrel then being disengaged by lever 0 from the pin N; andwhen the load is to be let down easily or controlled at any point of itsdescent the arm 0 of lever 0 may be pressed to disk 1?, while the pin Nof shaft B is engaged with the Windlass-barrel.

To let the load down slowly at any time by using the pawls, and when thebrake O P would not be effective-as, for instance, when loweringthe jackJthclevcr E will be rocked slightly to hold the load by one of the pawlswhile the other is retracted, the springs (Z G holding the lower pawl,D, to the ratchet, the spring G in this instance also coming into actionto insure the more positive engagement of the pawl D with the ratchetthan would be afforded by the spring (I alone; and by the action of theedgewise straight spring G on the ping to lift the pawl D out ofengagement with the ratchet G as said pawl is withdrawn or retracted,there will be much less danger of breaking the spring than when the endof the spring was bent laterally beneath the pawl, as in theconstruction described in said Patent No. 48,414.

The pinion K and jack-post standard or guide 1 add little weight to themachine, and

the jack-post J may almost instantly be adjusted in the standard orframe when required for use Having thus described my invention, what Iclaim as new, and desire to secure by Letters Patent, is

1. The combination, with a ratchetwheel and Windlass, of pawls D D,lever E, retainer H, and spring G, fixed to pawl D to act on pawl D,substantially as herein set forth.

2. The combination, with a ratchet-wheel and Windlass, of pawls D D andlever E, said lever carrying a spring, G, and the pawl D having a pin,g, on which said spring acts, and the spring G substantially as hereinset forth.

3. The combination, with a ratchet-wheel and Windlass, of pawls D D,said pawl D having a pin, 9, and the springs G G G d, a retainer, H, andlever E, arranged and operating substantially as herein set forth.

4. In ahoisting and lowering apparatus, the combination, with the frameA, shaft B, ratchet O, pawls D D, springs, substantially as described,adapted to act on the pawls, and lever E, of the pinion K on shaft B,and the re movablejack-post J j, supported and guided in the frame,substantially as herein set forth.

5. In a hoisting andloweringapparatus, the combination, with the frameA, shaft B, having pin N, ratchet O, pawls D D, springs, substantiallyas described, adapted to act 011 the pawls, and lever E, of the barrelL, having collar M and disk 1?, and notched at m, and the lever O,pivoted to frame A, notched at 0 and provided with the brake-arm 0substantially as herein set forth.

6. In a hoisting andlowering apparatus, the combination, with the shaftB, having pin N, and the barrel L, provided with disk P, and having itshub M notched at m, of the pivoted lever O, notched at 0 and providedwith the brake-arm 0 substantially as shown and described.

ISAAC I. LANCASTER.

Vitnesses:

EDWIN CLARK, SAMUEL Y. LISTER.

